1. PhD Student, Dept. of Chemical Engineering, Universita di Palermo, 90128 Palermo, Italy.
2. Professor, Dept. of Chemical Engineering, Universita di Palermo, 90128 Palermo, Italy (corresponding author).
3. Assistant Professor, Dept. of Chemical Engineering, Universita di Palermo, 90128 Palermo, Italy.
4. Assistant Professor, Dept. of Hydraulic and Environmental Engineering, Universita di Palermo, 90128 Palermo, Italy.